Fused salt heat exchange experimental device and control method thereof

Abstract

The invention discloses a fused salt heat exchange experimental device and a control method thereof. The experimental device comprises a high-temperature fused salt circulating circuit, a heat-conducting oil circulating circuit, a cooling water circulating circuit and a control system, wherein the high-temperature fused salt circulating circuit and the heat-conducting oil circulating circuit are separately connected with parallel fused salt heat exchange experimental sections; the heat-conducting oil circulating circuit and the cooling water circulating circuit are separately connected with a heat-conducting oil heat exchanger and a cooling water heat exchanger; the control system is a Fuzzy-PID (Proportion Integration Differentiation) control system, and has the characteristics of rapid response control, high control precision and easiness for realization. According to the fused salt heat exchange experimental device and the control method thereof disclosed by the invention, the project quantity of replacing the experimental sections is reduced; meanwhile, the experimental sections are simultaneously performed by intelligent control, so that the consumption of energy sources is reduced to a great degree, and accurate control over temperature and flow can be realized; meanwhile, aiming at the control over the parallel experimental sections, huge contribution on energy conservation is realized. Experimental operation personnel are away from an experimental table area, and intelligent automation is completely realized, so that the security of the experimental personnel is realized.

Description

technical field [0001] The invention belongs to the technical field of molten salt heat exchange, and relates to a molten salt heat exchange experimental device and a control method thereof. Background technique [0002] As we all know, molten salt has the characteristics of wide temperature range, high thermal stability, low vapor pressure, large heat capacity, strong ability to dissolve substances, low viscosity and relatively cheap price. Therefore, molten salt has broad application prospects as a heat transfer and heat storage fluid, such as in metallurgy, chemistry, nuclear power, and solar energy. Moreover, molten salt solar power plants have been used in commercial power generation around the world. Therefore, the large-scale molten salt heat exchange test bench has an important guiding role in the application of molten salt [0003] At present, there are many conventional molten salt heat exchange test benches, all of which are small-scale experimental benches with ...

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Problems solved by technology

[0005] 2) Flow control. For a large-scale molten salt heat exchange experiment platform, the flow rate changes in a large range. It is difficult to precisely adjust the flow rate only by adjusting the frequency of the pump, and only by adjusting the flow rate through the electric valve may cause internal leakage in the pipeline. If the pressure fluctuates too much, it will cause leakage and damage to the experimental pipeline or equipment, increasing the risk of the experiment

[0006] 3) Replacing the experimental section. For a large-scale molten salt heat exchange experimental platform, it is necessary to replace the experimental section. At the same time, the project is huge, and every time the experimental section is replaced, the experiment has to start from the beginning, and the energy consumption is also very large.

[0007] 4) Energy consumption. For a large-scale molten salt heat exchange experimental platform, heating, working medium circulation and cooling are all very energy-consuming

[0008] 5) Safety issues. Molten salt itself has a very high melting point, and the temperature of the heat exchange experiment between molten salt and heat transfer oil is even higher. At the same time, heat transfer between heat transfer oil and molten salt at high temperature is also easy to coke and produce solid impurities, thus blocking the experimental pipeline , and for the large-scale molten salt heat exchange experimental platform, this risk is even greater

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